<div class="card">
    <div class="card-header">
     {{news.author}}
    </div>
    <div class="card-body">
      <h5 class="card-title">{{news.title}}</h5>
      <p class="card-text" [innerHTML]="news.content| tohtml">

      </p>
      <a  class="btn btn-primary" (click)="goBack()">返回</a>
    </div>
  </div>
